There’s a Guerlain flacon montre with glass stopper on Charlotte’s bed-side table. The central disk of the label is not visible, so it’s hard to tell what perfume it contained. It’s dark, though, so we can make some assumptions.

It could be Ode, with the purple disk.

Or Vol de Nuit, with the navy blue disk.

It could also be Jicky, with the burgundy disk.

Or Liu, with the black disk.

Or even Mitsouko, with the emerald green disk.

Which Guerlain cologne do you think could suit the character? I would see her wearing Jicky, with its fresh spicy notes, or Liu, with its beautiful opening of aldehydes and bergamot.